/*
 * Created on Feb 9, 2005
 * Created by Alon Rohter
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package org.gudy.azureus2.plugins.network;

import java.net.InetSocketAddress;
import java.security.spec.AlgorithmParameterSpec;

import javax.crypto.spec.SecretKeySpec;

import org.gudy.azureus2.plugins.messaging.MessageStreamDecoder;
import org.gudy.azureus2.plugins.messaging.MessageStreamEncoder;

/**
 * Manages connections.
 */
public interface ConnectionManager {
    public static final int NAT_UNKNOWN = 0;
    public static final int NAT_OK = 1;
    public static final int NAT_PROBABLY_OK = 2;
    public static final int NAT_BAD = 3;

    /**
     * Create a new unconnected remote connection (for outbound-initiated connections).
     * 
     * @param remote_address
     *            to connect to
     * @return not yet established connection
     */
    public Connection createConnection(InetSocketAddress remote_address, MessageStreamEncoder encoder, MessageStreamDecoder decoder);

    /**
     * Returns the current view on whether or not we are inwardly connectable via our listener port
     * 
     * @return
     */
    public int getNATStatus();

    /**
     * @since 3.0.5.3
     */
    public TransportCipher createTransportCipher(String algorithm, int mode, SecretKeySpec key_spec, AlgorithmParameterSpec params)
            throws TransportException;

    /**
     * @since 3.0.5.3
     */
    public TransportFilter createTransportFilter(Connection connection, TransportCipher read_cipher, TransportCipher write_cipher)
            throws TransportException;

    /**
     * @since 4.7.0.3
     */

    public RateLimiter createRateLimiter(String name, int bytes_per_second);

}
